[ suhn ]
/ sʌn /


verb (used with object), sunned, sun·ning.

verb (used without object), sunned, sun·ning.

to be exposed to the rays of the sun: to sun in the yard.

Idioms for sun

Origin of sun

before 900; Middle English sun, sonne, Old English sunne; cognate with German Sonne, Old Norse sunna, Gothic sunno; akin to Old Norse sōl, Gothic sauil, Latin sōl (see solar1), Greek hḗlios (see helio-), Welsh haul, Lithuanian saũlė, Polish słońce


sun·like, adjective

Definition for sun (2 of 2)


or Sund

Example sentences from the Web for sun

British Dictionary definitions for sun (1 of 2)

/ (sʌn) /


verb suns, sunning or sunned

to expose (oneself) to the sunshine
(tr) to expose to the sunshine in order to warm, tan, etc

Derived forms of sun

sunlike, adjective

Word Origin for sun

Old English sunne; related to Old High German sunna, Old Frisian senne, Gothic sunno

British Dictionary definitions for sun (2 of 2)


abbreviation for


Scientific definitions for sun

[ sŭn ]

Often Sun. A medium-sized, main-sequence star located in a spiral arm of the Milky Way galaxy, orbited by all of the planets and other bodies in our solar system and supplying the heat and light that sustain life on Earth. Its diameter is approximately 1,392,000 million km (865,000 mi), and its mass, about 330,000 times that of Earth, comprises more than 99 percent of the matter in the solar system. It has a temperature of some 5.7 million degrees C (28.3 million degrees F) at its core, where nuclear fusion produces tremendous amounts of energy, mainly through the series of reactions known as the proton-proton chain. The energy generated in the core radiates through a radiation zone to an opaque convection zone, where it rises to the surface through convection currents of the Sun's plasma. The Sun's surface temperature (at its photosphere) is approximately 6,200 degrees C (11,200 degrees F). Turbulent surface phenomena analogous to the Earth's weather are prevalent, including magnetic storms, sunspots, and solar flares. The Sun was formed along with the rest of the solar system about 4.5 billion years ago and is expected to run out of its current hydrogen fuel in another 5 billion years, at which point it will develop into a red giant and ultimately into a white dwarf. See Table at solar system. See Note at dwarf star.

Cultural definitions for sun


The star around which the Earth revolves.

notes for sun

The sun is about 4.5 billion years old and is expected to remain in its present state for approximately another six billion years; it will eventually evolve into a white dwarf.

Idioms and Phrases with sun